The graphs shots shown there are taken from a real-world production ADSL connection. It is a 8 Mbit/s / 786 kbit/s ADSL connection shared by potentially 307 individuals. The network is directly connected to the Internet by a C-class of official IP-addresses, limiting the number of machines to 254.
The graph data is collected by the Graph module of the ADSL-optimizer.
The graphs, are described in Chapter 10 of the thesis, as they are used as part of the evaluation of the practical solution (the ADSL-optimizer software package).